search

Home  >  Article  >  Web Front-end  >  js realizes the uniform fade-in and fade-out of pictures

js realizes the uniform fade-in and fade-out of pictures

php中世界最好的语言
php中世界最好的语言Original
2018-04-19 09:15:252301browse

This time I will bring you js implementationPicturesFade in and out at a uniform speed, js realizes the picture fade in and out at a uniform speedWhat are the precautionsThe following is a practical case, let’s come together take a look. 

<!DOCTYPE html>
<htmllang="en">
<head>
  <metacharset="UTF-8">
  <title>淡入效果</title>
  <style>
    * {
      margin: 0;
      padding: 0;
    }
    p {
      border: 2px solid #aaa;
    }
    img {
      width: 300px;
      height: 300px;
      filter: alpha(opacity:30);
      opacity: .3;
      margin: 0 auto;
    }
  </style>
</head>
<body>
<p>
  <imgsrc="img/timg.jpg"alt=""id="img">
</p>
<script>
  var alpha=30;
  var img = document.getElementById("img");
  img.onmouseover=function(){
    startMove(100)
  };
  img.onmouseout=function(){
    startMove(30)
  }
  var timer;
  function startMove(tar) {
    var img = document.getElementById("img");
    clearInterval(timer);
    timer = setInterval(function () {
      var ispeed=0;
      ispeed= alpha<tar?5:-5;
      if(alpha==tar){
        clearInterval(timer)
      }
      else{
        alpha+=ispeed;
        img.style.filter="alpha(opacity:"+alpha+")";
        img.style.opacity=alpha/100;
      }
    }, 30)
  }
</script>
</body>
</html>

# I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

Recommended reading:



The above is the detailed content of js realizes the uniform fade-in and fade-out of pictures. For more information, please follow other related articles on the PHP Chinese website!

Statement：
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Previous article：JS implements data validation and check box form submissionNext article：JS implements data validation and check box form submission

Related articles

See more